Summit Carb problem
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Lead Driver
Joined: Mar 2008
Posts: 7,177
Likes: 377
From: Near Los Angeles
Summit Carb problem
For three months I have slowly and gradually been tuning a new Summit 600 cfm vs carb. It is on a hp 300, so I knew it would need some tuning and dialing in. From the time of installation to now I've had problems starting the truck when it was hot. I thought that issue would vanish with the proper calibration. Neither float level, jets, idle air bleeds, nor any other adjustment has helped.
Now when I speak to Summit there is no warranty. Research turned up the same issue with the original carb, the 4100 autolite, which the Summit copied. I thought with the redesign they would have eliminated that problem. Whoops.
Has anyone else experienced this?
Now when I speak to Summit there is no warranty. Research turned up the same issue with the original carb, the 4100 autolite, which the Summit copied. I thought with the redesign they would have eliminated that problem. Whoops.
Has anyone else experienced this?
Postmaster
Joined: Oct 2010
Posts: 4,656
Likes: 4
From: Northern and Southern Cal
I would start with your own comment that it has trouble when hot.
Off the top of my head questions would be, is there a reason that it might be vapor locking? Is there a place where the fuel lines are in close proximity to a heat source? Is there insulation between the carb and intake manifold?
Why is the hot engine affecting it?
Off the top of my head questions would be, is there a reason that it might be vapor locking? Is there a place where the fuel lines are in close proximity to a heat source? Is there insulation between the carb and intake manifold?
Why is the hot engine affecting it?
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